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Finding the Fourth Proportional to 385,531.40, 577,609.80 and 328,795.88

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Solution

The fourth proportional to 385,531.40, 577,609.80 and 328,795.88 is: 492,607.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,531.40 : 577,609.80 = 328,795.88 : x
  2. Step 2: Convert to fraction form
    385,531.40/577,609.80 = 328,795.88/x
  3. Step 3: Cross multiply
    385,531.40x = 577,609.80 × 328,795.88
  4. Step 4: Simplify right side
    385,531.40x = 189,915,722,487.62
  5. Step 5: Solve for x
    x = 189,915,722,487.62/385,531.40
  6. Step 6: Final answer
    x = 492,607.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.